Papers, Addresses, Reports: Some Problems in the Origin of the Mineral Veins (Address of the Retiring President); History and Forecast of Population of the State of Illinois; Extract From the Report of the Section Chairman (Agriculture);...

Papers, Addresses, Reports: Evolution of Sex in the Mollusca (Address of the Retiring President); The 1937 Flood in Southern Illinois; Extract From the Report of the Section Chairman (Agriculture); Evening Schools for Adult Farmers; The Art and...

As intriguing as its name is Giant City State Park with its Giant City section of ""Streets"" and peculiar stone formations, the great beauty of large trees and a wealth of plant and animal life. - Giant City, with 1,523 acres is one of Illinois'...

back of card: - Pere Marquette State Park, the largest of all the Illinois State Parks, is located north of Grafton, Jersey County on Illinois Route 100, near the confluence of the Illinois and Mississippi Rivers. The Park, comprising 6000 acres...

Papers, Addresses, Reports: Can We Meet the Challenge?; Papers Presented at the 47th Annual Meeting; The Fish Population of the Main Stream of the Big Muddy River; Ecological Factors Affecting the Growth of Smallmouth Bass and Longear Sunfish...

back of card: - Pere Marquette State Park, the largest of all the Illinois State Parks, is located north of Grafton, Jersey County on Illinois Route 100, near the confluence of the Illinois and Mississippi Rivers. The Park, comprising 5,180 acres...

back of card: - Pere Marquette State Park, the largest of all the Illinois State Parks, is located north of Grafton, Jersey County on Illinois Route 100, near the confluence of the Illinois and Mississippi Rivers. The Park, comprising 5,180 acres...

back of card: - Pere Marquette State Park, the largest of all the Illinois State Parks, is located north of Grafton, Jersey County on Illinois Route 100, near the confluence of the Illinois and Mississippi Rivers. The Park, comprising 5,180 acres...

back of card: - Pere Marquette State Park, the largest of all the Illinois State Parks, is located north of Grafton, Jersey County on Illinois Route 100, near the confluence of the Illinois and Mississippi Rivers. The Park, comprising 5,180 acres...